EUVD-2025-210619
GHSA-9wfh-9p7m-mp7r
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Network-accessible RTSP with public hardcoded credentials requires no meaningful authentication (PR:N, AV:N, AC:L); only confidentiality is breached via video stream exposure, no integrity or availability impact.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
3DescriptionCVE.org
Zosi C519M V4.2.8.823C01450BA is vulnerable to Incorrect Access Control. The application contains hardcoded credentials in the RTSP authentication mechanism. An attacker with network access can use the unchangeable default credentials to access the RTSP video stream, resulting in unauthorized viewing of camera footage.
AnalysisAI
Hardcoded RTSP credentials in Zosi C519M IP camera firmware V4.2.8.823C01450BA expose live video feeds to any network-reachable attacker. The built-in credentials embedded in the RTSP authentication mechanism cannot be changed by the device owner, making every affected unit permanently vulnerable to unauthorized stream access. A public proof-of-concept exists on GitHub, and CISA's SSVC framework rates the attack as automatable with no exploitation preconditions beyond network reachability - no public exploit identified as actively exploited in CISA KEV at time of analysis.
Technical ContextAI
RTSP (Real Time Streaming Protocol, typically TCP port 554) is the standard protocol used by IP cameras to deliver live video streams to clients. The root cause class is CWE-284 (Improper Access Control): the firmware includes static, unchangeable credentials hardcoded into the RTSP authentication handler, meaning all units share identical credentials that cannot be rotated or overridden through device configuration. This is a well-documented IoT anti-pattern where manufacturers ship devices with factory-default credentials baked into firmware rather than enforcing per-device unique secrets or requiring credential setup on first use. The CPE data provided (cpe:2.3:a:n/a:n/a) is non-informative and does not constrain the scope beyond the firmware string explicitly named in the description: V4.2.8.823C01450BA.
RemediationAI
No vendor-released patch has been identified at time of analysis - the vendor homepage (https://www.zositech.com/) does not contain a specific security bulletin for CVE-2025-70962. Because the hardcoded credentials are unchangeable by design, firmware remediation is the only true fix; monitor the Zosi support site for a firmware update. As an immediate compensating control, place the C519M behind a network firewall and block inbound access to TCP port 554 (RTSP) from untrusted networks - this prevents remote unauthenticated access but does not protect against threats from within the same local network segment. If remote camera viewing is required, route access through a VPN rather than exposing RTSP directly, trading some operational convenience for access control. Do not expose the camera's management or streaming interfaces to the public internet under any circumstances until a patched firmware is available.
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Same weakness CWE-284 – Improper Access Control
View allSame technique Authentication Bypass
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External POC / Exploit Code
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